US PATENT SUBCLASS 349 / 180
.~.~.~ Having particular parameter of twist

Current as of: June, 1999
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349 /   HD   LIQUID CRYSTAL CELLS, ELEMENTS AND SYSTEMS

167  DF  WITH SPECIFIED NONCHEMICAL CHARACTERISTIC OF LIQUID CRYSTAL MATERIAL {6}
177  DF  .~ Within nematic phase {2}
179  DF  .~.~ Twisted (or chiral) nematic or supertwisted nematic {2}
180.~.~.~ Having particular parameter of twist

DEFINITION

Classification: 349/180

Having particular parameter of twist:

(under subclass 179) Subject matter wherein the characteristic recited is a particular angle formed between the molecules near one substrate and the molecules near another substrate.

(1) Note. Excluded from this subclass is a twist angle of 90 deg., since all regular twisted nematic liquid crystal has a twist angle of 90 deg..